Liquid reagent feeder



Feb. 23, 1943. L. PALMQUlST 1,8 LIQUID REAGENT FEEDER 2 Sheets-Sheet 1Filed Jun 5, 194,1

Feb. 23, 1943- F. L. PALMQUIST LIQUID'REAGENT FEEDER 2 Sheets-Sheet 2Filed June 3, 1941 Patented Feb. 23, 1943 warren STATES ears QEFIC 4Claims.

' invention relates to a liquid reagent feeder, and'h'a's relation to amachine of this kind intended primarily to feed or distribute liquids,reagents and chemicals to flotation machines su'ch'as areused'inseparating minerals from rock and w'astematerial. minerals from eachother, coal from waste materials, hulls from wheat in the process ofpeeling wheat; and for various other purposes) It: is a particularobject of the invention to providea' feeder' tobe "used 'in distributingliquid materials wherever the amount to b'edistributed needs-to becontrolled;

It is also anobject of the invention to provide a feeder." of this kindincluding a pan mounted in a-manner' to be tipped forwards or backwardsto provide means for regulating or controlling the flow'of the liquidreagent to the flotation machine, and wherein means are provided forrecovering) surplus liquid which may overflow the pan.

Another object of the invention is toprovide a feeder of this kindincludingja pan mounted for tilting movement, and wherein said pan isprovided with a discharge spout V-shape in cross-section so that thespout may carry the smallest possible fiowwhen necessary, and whereimthedischarge end'portion of the spout is provided in its bottom with meansto break capillary attraction to allow the liquid to flow in drops whenonly a'small amount of liquid is desired for the flotation'machine;

Another objectof the invention is to provide a feeder of this kindincludinga tiltable pani'pro vided; with a dischargespout and whereinthe pan-is providedwith means to prevent surging of theliquid within thepan.

Theinvention consists-in the details of construction andin thecombination and arrangementqcf the several parts of' my improved liquidreagentufeeder whereby certain important ad'- vantages are attained,aswill'be hereinafter more fully, set. forth.

In order that my invention may be: the better' understood,. I will nowproceed to describe the same with reference to the accompanyingdrawings, wherein:

Figure 1' is a view, in top-plan, of a liquid reagent feeder constructedin accordance with an embodimentof" my invention;

Figure 2 is a fragmentary detailed sectional View taken substantially onthe line 2-2 of Figurel;

Figure 3 is an elevational view of one of the baiiie plates unapplied;

Figure 4 is an elevational View of a second baffle plate unapplied;

Figure 5 is a view in side elevation of feeder as illustrated in Figure1;

the

Figured-is adetailedvertical sectional view taken substantially on theline 6-6 of Figure 5; and

Figure 7 is a fragmentary detailed sectional view taken substantially onthe line 1-1" of Figure 5;

As illustrated in the accompanying drawings C denotes a c'ontainer'ofdesired'diinensions and having'its top face open. This container servesas a reservoir for" the desired liquid'reagent or chemical. This liquid;as herein disclosed, is de= livered within the'container C through afloat controlled spout'or nozzle-l supported within the container'C atthe upper portion thereof, and adapted for communication with a suitablesource of liquid supply. The float 2 associated With'the spout ornozzleI operatesina conventional manner to close oii'the flowinto'thecontainer C'through the spout'ornozzle' l'when'the liquid within thecontainer C reaches a prede' tel-mined level. As the structural detailsof the nozzle or spout I and the float 2" form no par ticular part ofthepresentinvention, a detailed description and illustration thereof isbelieved unnecessary.

Bridging the' space between the-end walls 3 of the'container C andsecuredthere'toin a conventional manner'by the-nuts 4 is a rod 5: Thisrod is positioned closely adjacent to the upper or open'face of thecontainer C and'ata desired location between the'si'de wallsfi'ofthecontainer. Supported from aboveon the rod 5 is an elongated-pan-P, withthe longitudinal axis of such pan P disposed at right angles to the rod5; Depending fromthe bottomwall T of the panP and disposed transverselythereof, is an elongated hearing 8 through which the rodfiis-freely'disposed so that the pan P issupported for tilting movement.This bearing 8' is positionedat substantially the longitudinal center ofthe pan P and is maintained in desired position upon the rod 5'by thecollars9; keyed or otherwise suitably fixed to'the rod 5 closelyadjacent to the ends of the bearing 8.

The pan P is of such dimensions'andthe rod 5 is so located toallowthe'pan P tohave" unhampered tilting movement. As illustrated in Figures1' and 6 of the'drawings, the front or outer end wall ll! of the pan Pis closely adjacent to'a side wall 6' of the container Ci This outer or'front wall II] carries'an outstanding bracket H having an elongatedopening I 2 through which passesan endportion of an elonated headedshank or bolt Minserted from below'through an outstanding" bracket l5"carried by the adjacent side wall 6 of the container C. The shank orbolt I 4, below the bracket II, has threaded thereon a nut l6 whichconstitutes an adjustable stop for contact with the bracket II frombelow. Threading-on the shank or bolt I4 above the bracket H is a wingnut I! providing means whereby the pan P may be effectively held orlocked in its selected tilting position, as may be determined by therequirements of practice. It is believed to be obvious that the pan Pmay be held in a desired forward or backward tilting position uponproper adjustment of the nuts l6 and H.

The upper portion of the front wall In of the pan P is provided with aV-notch a of desired size and which is defined by an outstanding spout|8. This spout I8 is of a length preferred and the bottom or apex of thespout l8, at its outer portion, is provided with a narrow or restrictedslot IQ of desired length and open at its outer end.

The end portion of the pan P provided with the spout l8 has disposedthereacross a plurality of baiile plates 20, 2| and 22. While theseplates in the present embodiment of the invention are three in number,it is believed that such number may be increased or even reduced ifdeemed advisable. These plates 20, 2| and 22 extend entirely between theside walls 23 of the pan P and are preferably equi-distantly spaced fromeach other with the forward bafile or plate similarly spaced from thefront wall l0. These plates 20, 2| and 22 are provided in their endportions with a series of vertically disposed openings 24 with theopenings in said baffles or plates alternately arranged in staggeredrelation. The openings 24 in each of the plates 20, 2| and 22 have atotal capacity equal to the largest flow intended to pass out throughthe spout l8. These bafiies or plates 20, 2| and 22 serve to preventsurges when the feed of liquid from the container C to the pan P isuneven. This maintenance of the liquid in quiescence within the pan P isfurther assured by not having the openings 24 of one of the bafiies orplates 20. 2| and 22 opposed to the openings in a second plate.

The pan P may be more particularly referred to as a distributing pan andthe liquid rea ent within the container C is discharged from abovewithin the end ortion of the pan P remote from the snout l8 through adischarge nozzle 25 depending from a pipe line 26 extending above thecontainer C and leading from the upper end portion of a standpipe 21.This standpipe 21 has its lower portion in communication with a pump 28of any desired type which serves to draw out the liquid within thecontainer C and force the same up through the standpipe 21 for deliveryinto the pan P through the spout or nozzle 25. In the resent embodimentof my invention the pump 28 is carried by an end wall 3 of the containerC and an intermediate portion of said standpi e 21 is held to said endwall 3 by a suitable clamp 29.

The amount of flow out throu h the spout I8 is determined by the tiltinadiustment of the pan P. The lower the forward tilt of the pan P. thegreater the dischar e through the spout l8 and vice versa. Therefore. itis to be particularly noted that effective control of the dischargethrough the spout Hi can be readily obtained u on proper tiltingadiustrnent of the an P and it is to be further stated that by havingthe notch a and, of course, the spout |8 in theform of a V. the streamflowing out through the spout. |8 can range from substantially zero tofull. The slot IS in the outer end of the spout l8 at its low pointserves to break the capillary attraction and will allow the liquid toflow in drops when only a small amount of discharge is needed.

The inner or rear end wall 30 of the pan P is provided in its uppermarginal portion with an elongated opening or recess 3|. This recess oropening 3| provides an overflow for the surplus liquid delivered to thepan P, and which surplus liquid returns within the container C.

From the foregoing description it is thought to be obvious that a liquidreagent feeder constructed in accordance with my invention isparticularly well adapted for use by reason of the convenience andfacilit with which it may be assembled and operated.

I claim:

1. A liquid reagent feeder including a pan, means for holding the pan inselected tilted position, and a discharge spout carried by a wall of thepan and disposed substantially at right angles to the axis about whichthe pan tilts, said spout being V-shape in cross-section, the outerportion of the spout at its low point being provided with a restrictedslot open at the outer end of the spout to provide means whereby liquidmay flow from the spout in drops.

2. A liquid reagent feeder including an elongated pan, means for holdingthe pan in selected tilting position, a discharge spout carried by anend wall of the pan at the upper portion thereof and disposedsubstantially at right angles to the axis about which the pan tilts, andbaflles disposed across the pan at the portion thereof to the dischargeside of the axis upon which the pan tilts, each of said bafiies beingprovided in one end portion with a plurality of vertically spacedopenings, the openings in the bafiles being alternately arranged instaggered relation, the openings of each baiiie having a total capacitysubstantially equal to the largest flow of liquid to pass out throughthe spout.

3. A liquid reagent feeder including an elongated pan, means for holdingthe pan in selected tilting position, a discharge spout carried by anend wall of the pan at the upper portion thereof and disposedsubstantially at right angles to the axis about which the pan tilts,baflles disposed across the pan at the portion thereof to the dischargeside of the axis upon which the pan tilts, each of said baiiles beingprovided in one end portion with a plurality of vertically spacedopenings, the openings in the bafiles being alternately arranged instaggered relation, the openings of each bafiie having a total capacitysubstantially equal to the largest flow of liquid to pass out throughthe spout, and means for delivering liquid within the end portion of thepan at the side of the axis upon which the pan tilts opposite to thedischarge side of the pan, the end wall of said portion of the panhaving an opening in its upper marginal portion to provide an overflow.

4. A liquid reagent feeder including an elongated pan, means for holdingthe pan in a tilted position, a discharge spout carried by an end wallof the pan at the upper portion thereof, said spout being disposedsubstantially at right angles to the axis about which the pan tilts andbaflies disposed across the pan, said baffles lying in a planesubstantially parallel to the plane of the axis about which the pantilts each of said baffles being provided in one end portion with aplurality of vertically spaced openings, the openings in the bafflesbeing alternately arranged in staggered relation, the openings of eachbafile havin a total capacity substantially equal to the largest flow ofliquid to pass out through the spout.

FRITZ L. PALMQUIST.

